AirHint found the following cheapest return flights from Chicago (MDW) to Sao Paulo (GRU) in March 2026 (see full year).

Return flights

07 Mar - 14 Mar	Frontier Airlines
09 Mar - 17 Mar	Frontier Airlines
02 Mar - 11 Mar	Frontier Airlines
12 Mar - 19 Mar	Delta
23 Mar - 27 Mar	Frontier Airlines
01 Mar - 14 Mar	LATAM Airlines Group
13 Mar - 23 Mar	Frontier Airlines
21 Mar - 10 Apr	Frontier Airlines
13 Mar - 20 Mar	Frontier Airlines
16 Mar - 21 Mar	Frontier Airlines
23 Mar - 30 Mar	LATAM Airlines Group
22 Mar - 10 Apr	Frontier Airlines
28 Mar - 02 Apr	Frontier Airlines
27 Mar - 02 Apr	Delta

Also check the deals for one-way flights from Chicago to Sao Paulo in March.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Chicago to Sao Paulo in March from 498€

Return flights